Malicious PDF — malware analysis report

Static analysis result for SHA-256 5712305b5f62668e…

MALICIOUS

PDF

66.5 KB Created: 2021-03-09 23:18:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6042ab5d61a2cf05d6919f165850be0b SHA-1: 4e241e01451585ed6be197f5b4631865b0021aba SHA-256: 5712305b5f62668e784cfd1448f4b7855cdfb11cadaa986a3df11ae33990764b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, suggesting a link farm or redirection scheme. The document body is heavily obfuscated, but the presence of URLs like 'https://pelibifir.ru/award?keyword=weight+loss+diet+plan+chart+pdf' indicates a potential phishing or SEO manipulation attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pelibifir.ru/award?keyword=weight+loss+diet+plan+chart+pdf PDF link annotation
    • https://cdn.sqhk.co/vimewiki/ijbEOnZ/cartoon_cat_minecraft_mod_download.pdfIn PDF document text
    • http://zatoxuvisovapuf.sportsontheweb.net/watorozilufagijafa.pdfIn PDF document text
    • https://cdn.sqhk.co/mesirunomi/djbgggd/kotoxaxuxelozozetud.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/cSicjc3/video_editor_free_online_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/bojowagawire/fgQWBM1/37474584566.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/nc8ijSC/37073708903.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwexosul/diwijhj/bank_balance_vs_available_balance.pdfIn PDF document text
    • http://bixuvukulizolu.22web.org/is_the_2011_acura_mdx_a_good_car.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/iajbiip/49262333392.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/hdrGlGO/reliance_general_insurance_online_policy.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/70957407662.pdfIn PDF document text
    • https://cdn.sqhk.co/junukexad/Fhbjeyc/how_to_not_talk_back_to_my_parents.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sonapap.rf.gd/relosajanojarimorasomi.pdfIn PDF document text
    • http://pagupim.epizy.com/47341529636.pdfIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_43668c8e4cb24bcda97adde0a516e5c9.pdf?index=trueIn PDF document text
    • http://sawotopedexorod.epizy.com/86079599114.pdfIn PDF document text
    • http://diveruwafulebes.epizy.com/ruduravenuruxinagolej.pdfIn PDF document text
    • https://0c285d22-23c9-487a-94f9-680958a2250f.filesusr.com/ugd/9c43ec_e4019a8d31484e1ab4f1616236919f7f.pdf?index=trueIn PDF document text
    • http://kikexufan.epizy.com/substation_automation_system_architecture.pdfIn PDF document text
    • http://ziritutu.epizy.com/jovovaxovola.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91F 5432 bytes
SHA-256: 152c0563dfea869b8118087c0b25ceb6c99f8283b13196b1d4667314b1f5d80c
font_01_sfnt_off0000dba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA3 9824 bytes
SHA-256: e17ce0dd3feffcca186631244a717b358f0149ccf6088780aeb22d4e7359980f

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